Charlie Noble Pistachio RY4 is a nutty variation on the well-known RY4 flavour. This hortfill e-liquid is a High VG flavour (20%PG/80%VG) and is sold in 60ml bottles filled up to 50ml so you can easily add 10ml of base.
You need to add 10ml of base. The nicotine level and PG/VG composition of the base will contribute to the end result. Here are some examples:
50ml Shortfill e-liquid + 10ml base 0mg/ml nicotine = 60ml e-liquid with 0mg/ml nicotine.
Shake and Vape (50ml) e-liquid + 10ml base 9mg/ml nicotine = 60ml e-liquid with 1.5mg/ml nicotine.
S&V with 50ml e-liquid + 10ml base 18mg/ml nicotine = 60ml e-liquid with 3mg/ml nicotine.
You can find more information in the section Shortfill (Shake and Vape) and Nicotine Calculator and Shortfill (Shake and Vape) and PG/VG Calculator.